Revolving door.



PATENTED JUNE 2', 1903.

v 0. COBB. K

. REVOLVING DOOR.

N0 MODEL APPLICATION FILED MAR 21 1900 2 SHEETS-SHEBT 1- PATENTED JUNE 2 -1903.

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2 SHEETS-SHEET 2.

I 0. COBB.- REVOLVING DOOR. APPLICATION FILED MAR 21, 1900 @151 [nve7zi01= filial/2e}.

U TED- STATES Patented June 2, 1903. PATENT ()FFICE.

OSCAR COBB, OF CHICAGO, ILLINOIS.

REVOLVING DOOR.

SPECIFICATION forming part of Letters Patent N 0. 729,548, dated June 2, 1903. Application filed March 21, 1900. Serial No. 9,482. (No'modeL) To ail rbhom it may concern:

Beit known thatl, OSCAR COBB, of Chicago,

' in the State of Illinois, have inventedcertain new and useful Improvements in Revolving Doors, of which the following is a specification. This invention relates torevolvingdoors mounted at angles to one another on a central pivotal upright post and used in conjuncare in normal position fornse; fourth, to pro vide means for adjusting the pivotal upright on ball-bearings and keepingout dust from the bearings; fifth, to provide means for adjusting the center-pin of the pivotal upright so that the pin can be easily thrown out of connection .with the floor and ceiling of the doorway for disconnecting the pivotal upright therefrom; sixth, to provide means for suspending the doors to the ceiling of the doorway when the center-pin is thrown, so that the doors can be moved to one side of the doorway; seventh, to provide wedge-shaped doors havingtheir thickest portion adjacent t0 the pivotal upright, with a view of dispos- .ing of the greater part ofthe stock and weight of the doors toward the center of the structure'and correspondingly lightening the outer portions; eighth, to provide means for preventing liability of injury to persons from being caught between the doors and the side of the door frame, and, ninth, to provide means for locking the doors to the floor of the entrance in any position. I attain these objects by the means illustrated in the accompanying drawings, in which- Figure 1 is a fragmentary side elevation of the lower part of a set of revolving doors containing my invention. Fig. 2 is a horizontal the door.

section taken at about the plane of the middleof the doors. Fig. 3 is a detail showinga vertical section on the line 3 3 of Fig. 2, extended through a fragment of the floor of the entrance. Fig. 4 is a detail showing, in elevation, a fragment of one of the doors at the upper edge thereof and the means for sus pending the doors to the ceiling of the entrance and shifting them to one side, and

also a longitudinal vertical section showing enlarged side elevation and a planor top view of a detached part. tails showing, respectively,'an enlarged front anda side elevation of a part as applied to Figs. 11 and 12 are details showingin elevation detached parts of the part shown in Figs. 9 and 10. Fig. 13 is an elevation of an en trance-way and the doors therein complete. Fig. 14 is a diagrammatic plan, partly in section, showing a fragment of the inclosure walls, the arc-shaped sides of the entrance, the doors therein, and the relative. position of other features. Fig. 15 is a diagrammatic view showing'the position of the doors when folded together. The normal relation of the doors so folded to the doorway is along or through, not transversely to, the same. Fig. 16 is a diagrammatic view showing a modification, the doors being folded. Fig. 17 is an enlarged diagrammatic view showing the taper of one of the doors, its po-. sition with relation to the pivotal center of the upright shown by dotted lines, and the means for making the doors flexible for certain purposes.

In the drawings, A designates the doors, and B the pivotal upright. 4

C is the floor of the doorway; O, the coiling, and G the arc-shaped sides of the inclosure.

Figs. 9 and 10 are de- The upright-is pivoted to the floor and ceiling by pins a, centrally located in the upright and entering suitable holes in the floorand ceiling in the middle of the doorway.

For the purpose of increasing the walkingspace between the doors I connect their sides to the sides of the upright, as shown in Fig. 2, so that they are not extended in the line of the pivotal center, but are placed to one side thereof.

As shown in Figs. 14 and 17, neither side of the angles formed by the adjoining faces of the doors is in line with the axis of rotation, and the vertexes of all said angles have like relation to said axis. The faces of the doors are at considerable distance from radial lines drawn parallel therewith, those nearest being off more than half the thickness of the doors. The arc-shaped sides of the easement are concentric to the axis of rotation; but the doors and both sides of the angles inclosing the walking-space between them are eccentric thereto, all the doors and angles having the same relation to the axis of rotation and areshaped casement. By this arrangement of the parts a considerable advantage is given to the walking-space embraced by the angles between the doors in length or in the direction through the way without increasingits width.

I distinguish this construction from revolving-door structures in which a series of radial doors or wings are united at a central junction-line, so as to permit of fixing them in planes either parallel or at any required angle with respect to each other. In such radialdoor structures the sides or lines of the doors facing toward the junction-line are not eccentric to the axis or casement, but in or on radial lines, and both sides of all angles between the wings are not off the center-line nor required to be so, nor is it necessary that the vertexes of all such angles should have the same relation to the rotation. Such structures are not designed to increase the walking-space lengthwise between the doors and do not practically secure that result.

For the purpose of varying the normal "relation of the doors, as when in use, I connect but two, or in some cases but one, of the doors, rigidly or permanently with the upright and binge the other doors to the ones having the permanent connection. Fig. 2 shows two of the doors connected permanently to opposite sides of the upright by means of spikes b b, the other doors being connected by hinges c c to these and having no fixed connection to the upright. By this means the hinged doors can be folded upon the others to the position shown in Fig. 15 and'extended through the doorway. By attaching one only of the doors rigidly to the upright and using three of the hingeconnections 0 the doors may be folded, as shown in Fig. 16. Y

' For the purpose of locking the hinged doors in their normal relation for use I pro.-.

vide a hinged lock or piece D, which is adapted to be attached toa rigidly-connected. door and to engage a striking-piece D, Figs.

7 and 8, adapted to a door hinged thereto. One memberd of the piece D carries a swiveling eccentric cam (1, provided with a ham dle or lever (1 and the piece D has a catch (1 with which the cam is adapted to engage when the member dis thrown over against the piece D, and the lever is thrown over to the position seen in the drawings. The lock is released when the lever is reversed and the member d can then be turned back, so as to allow the hinged door to turn on its hinges c and fold upon the relatively fixed door to which it is so connected, as illustrated by dotted lines in Fig. 2.

The upright is carried on hall-bearings, which comprise a metallic plate E set in the floor of the doorway, a plate E fitting loosely in a recess in plate E, the adjacent faces of said two plates being provided with a circular recess or depression forming a ball-race e and a set of balls in the ball-race. The upright has rigid connection with the plate E, so that when .turned the upright will turn said plate and be carried around on the balls traveling in the ball-race. A sheet e of rubher, sole-leather, or similar materialiscon.

doorway outside of the plate E for excluding.

dust from the ball-bearings.

For the purpose otdetaching the upright from the floor'and ceiling and removing it or shifting its position in the doorway the pins a are set so as to slide in a sleeve or perforated plate a, attached to the ends of the uprights and connected to links a, each extending partly through a central bore of the upright and attaching to-a swivel-plate a located in a chamber or -recess in, the uprightand provided with a projection a, adapted to receive a key for swiveling the plate, and thereby pulling the links toward the swivelplate and drawing the pins out of engagement with the holes in the floor and ceiling; The links will also serve'lthe purpose ofprojecting the pins a from the ends of the upright on a reverse movement of the swivelplate when replacing the doors in the doorway for use. The chamber or recess in the upright for the swivel plate is covered by one of the hinged doors A, so asto be accessible when the door is folded, as before described,

upon the door to which it is hinged. The pin a and the hole in the sleeve a and plate E are square to cause the with the upright.

For the purpose of suspending the doors to the ceiling of the doorway and sliding them to one side thereof I provide two parallel slideways F in the ceiling, which are extended from one side of the doorway toward and somewhatbeyond the pointof the pivotal connection of theupright part, their position being illustrated in Fig. 14. Said slideways preferably comprise a long metallic box F with aslot f in its under side and having screwholes through its upper side and through plate E to revolve 5 has a slot gin the under side with flanges f depending in the slot f. G is a threaded bolt with one end pivoted to the door near its upper edge, so as to swing parallel with the door. G- is a sleeve internally threaded at its opposite ends, and G2 is a threaded bolt provided with'a T head. The threads of the bolts and sleeve are oppositely inclined, so.

that rotation of the sleeve will draw the bolts, together or move them apart in accordance 'with the direction of rotation. When the T-head is presented 'edgewise, it can be passed into theslot g and then the bolt can be turned aquarter, so as to. bring the head across the slot, and in this position rotation of the sleeve in the proper direction will cause the head to bear upon the sliding piece, and thereby the doors may be suspended from the ceiling. The suspending means is used in connection with two of the doors on opposite :sides of the 14 and 15, so that when the doors arefolded uprightin the position illustrated at G Figs.

together andex'tended through the doorway and transversely to the slideways they may v be suspended from a sliding' piece in each of the slideways and moved over to one side of the doorway, where they can be secured-to the floor and left until required for further use. I prefer to rest the suspending-bolt G on a pin orbook g, Fig. 4, when not in use. For the purpose of disposing of the greater amount of stock and weight toward the center I make the doors thickest at the inner portion next to the upright and gradually reduce the thickness toward the opposite or 40 outer portion, as illustrated in Fig. 17, which shows the thickness of the outer portion reduced to nearly one-half as compared with that of the opposite portion. By this means provided with a longitudinal groove L, having a transverse extension m at the lower end adapted to the flexible joint of the rod and to hold it off from the door, so that the tension ofthe spring will tend to hold the outer partof the doorin normal position for use, but will yield and permit it to bend back in the event of its meeting substantial obstruction or unusual resistance in the way when the revolving structure is in motion.

For the purpose of locking the-doors to the floor of the entrance in any position I employ a surface bolt' having ,an eccentric elastic foot-piece for contact with the floor and means 'forpressing the foot-piece to lock it'in place -which has a foot-piece is, pivoted thereto through an elongated opening-la, eccentric to he curve of the bottom of the foot-piece, and a lever or handle K, provided withinclined teeth-k on one side. The bolt K is and a-similar extension m at the upper end,

in conjunction with the reduced end m of the bolt. The handle K is provided with a holeadapted to fit on the reduced end m and is secured thereon by riveting, and it -is'. free to revolve thereon through a quarter of a revolution. A lug non the handle work's in the slot m and operates as'a stop against the ends of the slot to prevent further revo-' lution. A stop-pin 72 works in the slots L to permit the bolt to be raised -and lowered and to prevent rotation of the'bolt in the barrel and in the slot on to permitrotation through .a quarter-turn and to holdthe foot-piece up off the floor when the .lock is not in use.

ments, what I claim, and desire to secure by Letters Patent, is

1. In a structure of the class described the combination with a rotatable upright of a series of doors mounted upon the upright and extended at angles-to each other, the lines of both sides of all the angles between the doors being eccentric to the axis of rotation,

and a casement having arc-shaped sides concentric to the axis of rotation as and for the purpose specified.

2. In a structure of the class described the combination with a rotatable upright of a se-' the lines of both sides of all the angles being.

eccentric to the axis of rotation, one or more of said doors being permanently connected to the upright and the others being hinged to those permanently connected, and mechanism for locking the hinge connections as specir 4., In a structure of the class described, the combination with the upright and the doors permanently connected and hinged thereto, of a hinged locking mechanism comprising a piece I) having a hinged member d provided with a lever-actuated, swiveling, eccentric cam, and a striking-piece D'provided with a catch (1 as specified. A

5. In a structure of the class described, the combination with the upright and the case meat-floor, of the plates provided with the ball-race, and the elastic dust-shield secured to the bottom of theupright and adapted to bear upon the floor around said plates as specified.

6. In a structure of the class described the combination with the upright provided with folding doors and sliding pivot-pins, of parallel slideways formed in the ceiling of the pivoted upright, of the suspending means comprising parallel slideways in the ceiling of the easement, a sliding piece fitted to slide in each of the ways, and a pair of threaded bolts for each of the slideways connected by threaded sleeve, one of said bolts being pivoted to the door and the other of the bolts be.- ing provided with a T-head', adapted to'en gage the sliding piece as specified.

8. ,In a structure of the class described the combination with a rotatable upright of a series of wedge-shaped doors having their thickest portion adjacent to'the upright, the doors being extended on' lines substantially parallel with and clear oi! from a center line so as to atford free space between the thickest part of the doors and such center line as specified.

9. In a structure of the class specified, the

combination with the upright of the doors made in two parts and connected by a hingejoint at one side and a spring on the opposite side adapted to hold the joint closed in normal use and to yield and permit flection of the door under unusual resistance as specifled. i

'10. In a structure of the class specified the door A made in two parts in combination'with a hinge h on one side and a'jointed rod I spring I and pivoted stud 'P-as specified.

11. In astructure of the class specified, the combination with the revolving structure and casement of a locking means comprising a bolt provided with an'ela'stic foot-piece," with a urved bottom pivoted to thebolt eccentrical ly to the curvefl of the bottom and lever mechanism for'act-uating the bolt in pressing the foot-piece upon the floor of the'case'men't' at any point of its path thereon as specified. 12. In a structure of the class specified, the combination with the revolving. structure and casement of a locking means comprising a plate provided with screw-holes and inclined teeth, a barrel mounted on the plate, a bolt.

fitted to slide in the barrel and provided with stops limiting 'its rotation to a quarter-. turn,- an elastic foot-piece eccentrically pivoted to the lower end'of thegbolt and 'a lever mounted to revolvea quarter-turnon the bolt and provided with inclined teeth adapted to ven-- gagethe' inclined teeth of the platoon the quarter-turn as specified. I I osoAfrt COBB.

Witnesses:

ANNIE M. ADAMS, L. VERNON Fannie. 

